How are you triggering/running kconfig? Are you using some kind of
actionSet or popupMenu? If yes you implement some interface like
IWorkbenchWindowActionDelegate or IObjectActionDelegate in one of
your classes. Both have a selectionChanged(IAction action,
ISelection selection) method you have to override (which will be
called when triggered). The passed selection is, depending on what
is currently selected an instance of either IStructuredSelection (
-> selection in "Project Explorer" or "C++ Projects" view on
project/folder/file/etc) or ITextSelection ( -> selection in
editor).
In the first case you can use the
structuredSelection.getFirstElement() to get some resource
(ITranslationUnit/IProject/IContainer/IFile). In the second case use
"PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor().getEditorInput()"
to get the editor reference. It normally hase the type
FileEditorInput which provides a getFile() method.

Hope this helps!
Lukas

On 13.11.2012 20:46, Jason Litton
wrote:

I'm building a plugin that will
parse and generate KConfig menus inside Eclipse. Sadly, I won't
be able to push this to CDT, since it requires the Antlr runtime
library (BSD license). I'm going to try, however, to make it an
open plugin for the community. However, I'm stuck on one final
request that's been given me. My C developers want kconfig to
load automatically from the selected project. "Hey, no problem,
that's easy," I thought to myself. Now I'm running down a rabbit
hole. I have no idea where I pick up the location of the
selected project. I've tried looking at the BuildAction to get
an idea, since that is linked to the active project, but that
chooses which projects have build configurations, and sorts from
there, which doesn't help me. I've googled around and seen to
use the selection service, but that always comes back null. So,
since I know CDT is, at times, liking to the project selected in
the project explorer window, can you tell me where I can pull
that information, or point me somewhere in the CDT code where
that information is being pulled?
Thanks,
Jason